Sheet-metal article.



PATENTED FEB. '7, 1905.

J. KENNY.

SHEET METAL ARTICLE.

APPLIOATION FILED APB. 4.1904.

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iINITED STATES Patented February '7, 1905.

PATENT FFICE.

SHEET-METAL ARTICLE.

SPECIFICATION forming part of Letters Patent No. 782,142, dated February'7, 1905,

Application filed April 4, 1904. Serial No. 201,408.

To u/l 1/7/0111, it 71m, concern:

Be it known that 1, MICHAEL J. KEXNY, of East \Valpole, county ofNorfolk, State of Massachusetts, have invented an Improvement inSheet-Metal Articles, of which the following description, in connectionwith the accompanying drawings, is a specification, l'ike characters onthe drawings representing like parts.

This invention relates to improvements in the manufacture of sheet-metalarticles-as,

for instance, boxes, cans, and the like and has particular reference tothe formation of the seam between the body and head or end of thearticle; and the invention has for its object the novel construction ofthe seam.

The invention consists in a sheet-metal article having a folded seam anda narrow metallic strip entirely inciosed within the seam formedintegral with one of the members of the article. The narrow metallicstrip is compressed severely while inclosed within the seam by severelycompressing the seam and while serving as a filling-strip acts, bycrowding the several inner folds of the seam, to cause all the recessesor crevices to be filled and a l1ermetically-tight seam to be produced.

Figure 1 shows in side elevation a sheetmetal article embodying thisinvention. Fig. 2 is an enlarged cross-sectional detail of the seam.

a represents the body of the sheet-metal article, and I) the head orend. The body a has a seaming-flange a, and the head or end L has aseaming-flange comprising the folded portions l)" b, which areinterlocked in any usual or suitable manner with the seaming-flange a onthe body, so as to present what is commonly called a double-locked seam.The end of the portion 1/ of the seaming-flange on the head is turnedover upon itself a short distance from its edge, and such turned-overportion forms a narrow strip 9. The strip ,0 is designed to serve as afilling-strip, and in order that it maysubservc itsintended functions itis entirely concealed within the seam, and when the seam is severelycompressed the opposite sides of the seam will occupy smooth parallelplanes, and the filling-strip g, which is entirely inclosed therein,will be severely compressed and will act to crowd the inner folds of theseam more or less, and thereby cause all recesses or crevices to befilled and a hermetically-tight seam to be produced.

For simplicity of construction and ease of manufacture it is preferredthat the fillingstrip 5/ shall be formed as an integral part of theseaming-flange on the head, although my invention is not so limited. Inpractice .I prefer to manufacture the sheet-metal article in accordancewith the method shown in my application for Letters Patent, Serial No.193,637, filed February 15, 190%; yet it is obvious that it may beotherwise manufactured.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is*

1. A sheet-metal article having a folded seam and a narrow filling-stripentirely inclosed within the seam, which is formed integral with one ofthe members of the a rticlc, and which acts, when the seam iscompressed, to crowd the inner folds thereof, substantially asdescribed.

2. A sheet-metal article comprising a body and a head connected by afolded seam, and a narrow filling-strip entirely inclosed within theseam which is formed integral with said head, and which acts, when theseam is compressed, to crowd the inner folds thereof, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

MICHAEL J. KENNY.

\Vitnesses:

B. J. Noyes, H. B. DAVIS.

